Oscillation for gang-saws.



J. L. GRAHAM. OSCILLATION ron GANG sAws. APPLIOATION FILED MALES, 1908.

968,342. Patented Aug,23,1910.,

3 SHEBTFSHEET 1.

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WITNESSES: INVENTOR ATTORNEY J. L. GRAHAM.

OSOILLATION FOR GANG SAWS.

APPLICATION FILED HALZS, 1908.

968, 342. I Patented Aug.23, 1910.

3 SHEETS-SHEET 3.

ATTORNEY rus mmms PETER: co., wasnmarau, n. c.

UNITED STATES PATENT OFFICE.

JOHN Il- GRAHAM, OF REYNOLDSVILLE, PENNSYLVANIA, ASSIGNOR TO WICKES BROTHERS, OF SAGINAW, MICHIGAN, A CORPORATION OF MICHIGAN.

OSGILLATION FOR GANG-SAWS.

Patented Aug. 23, 1910.

Serial No. 423,484.

To all whom 'it may concern:

Be it known that I, JOHN L. GRAHAM, a citizen of the United States, residing at Reynoldsville, in the county of J efierson and State of Pennsylvania, have invented certain new and useful Improvements in Oscillation for Gang-Saws; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to means for shifting the positions of the arcs of oscillation of slides for gang saws, and consequently the incline of the slides.

One object is the provision of means for maintaining a proper relation between the amount of forward advance of the saws and the rate of feed of timber to the saws.

Another object is the provision of means for automatically shifting the positions of the arcs of movement of the, slides simultaneously with the adjustment of the rate of feed of the timber.

To these ends, therefore, my invention consists in certain novel features and combinations, such as will be more fully described hereinafter and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side view of my invention applied to a gang saw; Fig. 2 is an end view of a gang saw; Fig. 3 is a detail cross-sectional view showing an adjustable shaft connection and the means for effecting its adjustment and Fig. 4: is a sectional side view illustrating the slides in which the saw sash is received and their connection with the shaft-s.

(A) indicates a gang saw frame, to the inner faces of which are pivoted the slides arranged in pairs (1) (1) and (2) (2) and pivotally supported as at o, 0. These slides are adapted to receive blocks cl, d, in which the horn pins 8, 8, carried by the sash 7, are received, and it will be observed that the pivotal points of the slides are in approximately the same horizontal plane with the horn pins when the latter are at their upper limits of movement as shown in Fig. 4. Rock shafts (3) and (a) are journaled on the frame, the shafts each carrying an arm (5) suitably connected to the free ends of the slides in any convenient manner as by the rods 6, e. A linkage. (6) connects the two rock shafts, whereby motion imparted to one will be transmitted to the other.

Generic claims to the invention herein disclosed are contained in my co-pending application filed March 26, 1908, Serial No. 423,486.

The rock shafts are oscillated for the purpose of swinging the slides toward and from the constantly-infeeding timber whereby the saws are advanced toward the timber in proportion to the speed of travel of the saws and the rate of feed of timber thereto.

It is often desirable to increase or diminish the rate of feed of the timber to the saws and in such instances it is necessary, in order that the saw make a full cut and that each tooth engaging the timber may cut an equal or substantially equal length of chip, that the position of the arc of oscillation of the slides and hence the incline of the slides be changed, (the amount of oscillation remaining constant), whenever the rate of feed of the timber is adjusted. To this end, I provide the following mechanism as one exemplification of my invention. The rock shaft (4:) is provided with a crank A countershaft (10) is journaled to the front of the gang frame and is provided with a similar crank (11) connected to crank (9) by means of a couple of preferably alined rods (12) (12), the adjacent ends of which are connected by means of a turn-buckle (13). The countershaft (10) is oscillated by means of a crank arm (14) and link (15), the latter eccentrically connected to the main drive shaft (16). The countershaft (10) has a fixed arc of oscillation, but a rotation of the turn-buckle (13) will shorten or lengthen the combined length of rods (12) to partially rotate the shaft (4:) in one direction or the other and thereby vary the position of the arc of oscillation of the slides (1) (1) (2) (2), and consequently the incline of the slides vertical line.

A number of means may be employed to rotate the turn-buckle in one direction or the other either manually or automatically and as one method for obtaining an adjustment of the rock shaft (4) simultaneously with the adjustment of the rate of feed, I Y may provide the following construction.

relative to a fixed The feed works comprise feed rolls (17) ter-shaft and rock shaft respectively, and a journaled in the frame of the gang, the feed rolls being driven by the gears (18) (18) actuated from the bevel gear (19) with which pinion (20) meshes. The pinion (20) is fast on a shaft (21). A friction-wheel (22) is slidingly mounted on the shaft (21) and engages the friction drive disk (23). In order to shift the friction-wheel relative to the disk (23), I provide a sliding rod (2 1) controlled by a hand-wheel The rod carries an arm (26) connected to the hub of the friction wheel (22) Movement of the rod will therefore, shift the frictionwheel relative to its disk to vary the speed of rotation of the rolls (17 and consequently the feed. To simultaneously shift the positions of the arcs of movement of the slides, I provide the sliding rod (24:) with a second arm (27), its outer end being se cured to a rack (28) adapted to mesh wit-h the teeth of a gear (29) feathered as at (30) on the turnbuckle Movement of the sliding rod in one direction or the other will raise or lower the rack, rotating the gear (29) and turn buckle 13 in one direc tion or the other to lengthen or shorten the connection between the rock and counter shafts (4:) and (10) to swing the rock shaft and change the position of the arcs of movement of the slides.

Having thus fully disclosed my invention, what I claim as new is 1. As a means for adjusting the amount of advance of a saw gang toward the cant, the combination with a sash, horn pins carried thereby, a plurality of pairs of slides, means for pivotally supporting the slides on a plane approximately horizontally in line with the horn pins when the latter are at their upper limits of movement, a main rock shaft, a linkage connecting the shaft with at least one pair of slides, a countershaft independent of the linkage, and lying substantially parallel with the rock shaft, means for imparting a fixed oscillation thereto, and adjustable means connecting the countershaft and the main rock shaft for varying the position only of the arc of movement imparted to the slides.

2. As a means for adjusting the amount of advance of a saw gang toward the cant, the combination with a sash, horn pins carried thereby, a plurality of pairs of slides, means for pivotally supporting the slides on a plane approximately horizontally in line with the horn pins when the latter are at their upper limits of movement, a main rock shaft, a linkage connecting the shaft with at least one pair of slides, a countershaft spaced apart from and substantially parallel with the rock shaft, the countershaft being independent of the linkage, means for imparting a fixed oscillation to the counter-shaft, arms carried by the counlongitudinally adjustable rod connecting the arms.

3. As a means for adjusting the amount of advance of a saw gang toward the cant, the combination with a sash, horn pins carried thereby, a plurality of pairs of slides, means for pivotally supporting the slides on a plane approximately horizontally in line with the horn pins when the latter are at their upper limits of movement, a main rock shaft, a linkage connecting the shaft with at least one pair of slides, a counter-shaft spaced apart from and substantially parallel with the rock shaft, the counter-shaft being independent of the linkage, means for imparting a fixed oscillation to the countershaft, arms carried by the counter-shaft and rock shaft respectively, a rod pivotally secured to each arm, a turn buckle connecting the adjacent ends of the rods, and means for actuating the turn buckle to adjust the connection during the operation of the machine.

4:. As a. means for adjusting the amount of advance of a saw gang toward the cant, the combination with a sash, horn pins carried thereby, a plurality of pairs of slides, means for pivotally supporting the slides on a plane approximately horizontally in line with the horn pins when the latter are at their upper limits of movement, a main rock shaft, a linkage connecting the shaft with at least one pair of slides, a counter-shaft spaced apart from and substantially parallel with the rock-shaft, the counter-shaft being independent of the linkage, means for imparting a fixed oscillation to the countershaft, arms carried by the counter-shaft and rock shaft respectively, a rod pivotally secured to each arm, a turn buckle connecting the adjacent ends of the rods, a gear feathered on the turn buckle, and means for rotating the gear to vary the position of the arc of movement of the gang, the length of such are remaining constant.

5. In a gang saw, a sash, horn pins carried thereby, a plurality of pairs of slides, means for pivotally supporting the slides on a plane approximately horizontally in line with the horn pins when the latter are at their upper limits of movement, a rock shaft, a linkage connecting at least one pair of slides and the rock shaft, a counter-shaft lying substantially parallel with the rock shaft and independent of the linkage, means for imparting a fixed oscillation to the rock shaft, an adjustable connection between the counter-shaft and rock shaft for varying the positions only of the arcs of movement imparted to the slides, a feed mechanism, means for changing the rate of feed, and means connecting the means controlling the rate of feed and the adjustable connection to the end that the adjustment of the rate of feed will simultaneously adjust the position of the arc of movement imparted to the slides, the length of such are remaining constant.

6. In a gang saw, a sash, horn pins carried thereby, a plurality of pairs of slides, means for pivotally supporting the slides on a plane approximately horizontally in line with the horn pins when the latter are at their upper limits of movement, a rock shaft, a linkage connecting at least one pair of slides and the rock shaft, a counter-shaft lying substantially parallel with the rock shaft and independent of the linkage, means for imparting a fixed oscillation to the rock shaft, arms carried by the crank shaft and the rock shaft, rods pivotally connected to the arms, a turn buckle connecting the adjacent ends of the arms, a gear feathered on the turn buckle to permit longitudinal movement of the latter, and means for rotating the gear.

7. In a gang saw, the combination with a plurality of pairs of slides, of a rock shaft, a linkage connecting the shaft with at least one pair of slides, a power shaft, a countershaft having a fixed arc of oscillation imparted thereto from the power shaft, an adjustable connection between the countershaft and the rock shaft for actuating the latter, to shift the position of the arc of movement imparted to the slides, the length of such are remaining constant irrespective of its position, and means for adjusting such connection to shift the position of the arc of movement of the slides while the machine is in motion.

8. In a gang saw, the combination with a pair of pivotally-mounted slides, a rock shaft, and a linkage connecting at least one of the slides to the rock shaft, a countershaft, means for imparting a fixed oscillation to the counter-shaft, arms fastened to the rockand counter-shafts respectively, a rod pivotally secured to each arm, a turnbuckle connecting the adjacent ends of the rods, a gear feathered on the turn-buckle, a feed works, a rod for changing the rate of feed, an arm carried by the rod, and a rack secured to the arm and in mesh with 

